Tribological Behaviour of Plasma-Sprayed Graphene Nanoplatelets Reinforced Hydroxyapatite Nanocomposite Coating

被引：5

作者：

Singh, Swarnima ^{[1
]}

Sharma, Swati ^{[2
]}

Keshri, Anup Kumar ^{[1
]}

机构：

[1] Indian Inst Technol Patna, Plasma Spray Coating Lab, Met & Mat Engn, Bihta 801106, Bihar, India

[2] Malaviya Natl Inst Technol Jaipur, Dept Met & Mat Engn, Jawahar Lal Nehru Marg, Jaipur 302017, Rajasthan, India

来源：

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2021年 / 74卷 / 11期

关键词：

Wear and friction; Hydroxyapatite coating; Graphene nanoplatelets; Plasma spraying; CARBON NANOTUBE; ELECTROCHEMICAL CORROSION; MECHANICAL-PROPERTIES; OXIDE;

D O I：

10.1007/s12666-021-02367-7

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

We aim to understand the tribological properties of graphene nanoplatelets (GNPs) reinforced hydroxyapatite (HA) composite coating synthesized using plasma spray on Ti alloy substrate (Ti-6Al-4 V). A significant reduction of 83% in wear volume loss is observed on addition of 2 wt. % GNPs in HA as compared to bare HA coating, respectively. Similarly, coefficient of friction (COF) shows the relative reduction of 70% is HA-2 wt. % GNP coating. Post-wear analysis by Raman spectroscopy confirms the retention of GNPs with the enlarged defect over the worn surface. FE-SEM investigation of worn surface shows the strengthening mechanism such as GNP bridging, GNP pull-out which could be attributed to enhanced wear resistance of the coating. GNPs induced lubrication has been observed as the prime reason for lower COF of the worn surface.

引用

页码：2901 / 2907

页数：7

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